the fbi has now retraced his steps. a long list of dates and locations since 2001, when they believe he may have killed repeatedly. they so far have eight confirmed murders and rapes, including a couple in essex, vermont, four in washington state and one more on the east coast with a body hidden in new york. and he told agents something they'd never heard before. that he left kill kits or caches, buried in several states, filled with everything he'd need to commit a murder. they were in waterproof containers and included guns and different things he could use to dispose of bodies. his strategy, to grab people in remote locations, like parks, campgrounds, even cemeteries. >> every serial killer, including, i believe, mr. keyes, are not crazy. you cannot be that organized and deliberate and fit any legal definition of insanity. >> you might not get exactly -- not as much to choose from, in a matter of speaking, but -- there's always no witnesses, really, there's nobody else around. >> reporter: investigators say keyes is